★★★★★ 5
OE Quality Part
Worked perfectly. Everything needed is there.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 27, 2026
Hex Head Bolt 3/8"-16 x 4" Partial thread - Zinc Plated Grade 5
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Hex Head Bolt 3/8"-16 x 4" Partial thread - Zinc Plated Grade 5Hex Head Bolt PDF Product Details : Hex Head Bolt 3 8" 16 x 4" Partial thread Zinc Plated Grade 5 Product Type: Hex Head Bolt Thread Size: 3 8" 16 Bolt Diameter: 3 8" Thread Count (Pitch): 16 Length: 4" Thread: Partial thread Thread Type: Coarse Imperial Thread Direction: Right Hand Thread Material(s): Steel Finish: Zinc CR+3 Steel Grade Class: Grade 5 Standards and Certifications: ASME B18. 2. 1 For any information about products, please contact us.
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Your Hex Head Bolt 3/8"-16 x 4" Partial thread - Zinc Plated Grade 5 orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.7 ★★★★★
Based on 962 reviews
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Product Reviews
★★★★★ 5
10 out of 10
The must do service package. This is a "fits multiple" kit so youll have some extras. The kit also includes the lower unit gear oil seals, which is awesome. I always trust quicksilver to be durable and a great value for the money.
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Reviewed in the United States on February 23, 2026
★★★★★ 5
Recommended replacement parts
Worked as advertised, quicksilver parts for replacement on alpha drive gen 2 outdrive.
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Reviewed in the United States on April 8, 2026
★★★★★ 5
Very complete kit
This Kit has everything you need to change your waer pump impellor. It comes with directions that are easy to follow, but there re plenty of videos available to help. The Quicksilver kit is priced well and was delivered quickly.
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Reviewed in the United States on November 13, 2025
★★★★★ 5
Perfect OEM fit
Fixed my impeller on my Mercury Salt Water 115. Best done as a two man job. Lots of videos available online .
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 14, 2026
